Drawing instrument or attachment for such instruments.



No. 891,810. PATENTED JUNE so, 1908. K. J. BBRGLIND. I

DRAWINGINSTRUMENT 0R ATTACHMENT FOR SUCH INSTRUMENTS.

APPLICATION FILED FEB. 13, 1907.

witnesses I In verzior In: NORRIS PITIRS 20., WASNINOM, n. r.

UNITED sTATEs PATENT oEEroE.

KARL JOHAN BERGLIND, OF BLIXTORP, FRIDENED, SWEDEN.

DRAWING INSTRUMENT OR ATTACHMENT FOR SUCH INSTRUMENTS.

Application filed February 13, 1907.

To all whom it may concern:

Be it known that I, KARL JoHAN BERG- LIND, asubject of the King of Sweden, and resident of BliXtorp, Fridened, Sweden, have invented new and useful Improvements in Drawing Instruments or Attachments for Such Instruments, of which the following is a specification, reference being had to the drawing accompanying and forming a part hereof.

This invention relates to improvements in that class of drawing instruments, or attachments for drawing instruments employed for making broken lines in which the motion of the instrument, acting through suitable mechanism, raises and drops the pen, pencil, or other marking device causing it to form dots, or'dots and dashes, or any other desired form of broken lines, as the case may be. For producing such bro'kenlines with a drawing lnstrument, such as a drawing-pen, or a pencil, or the like, an attachment has been employed consisting of a rotary angle member forming a sort of tripping or actuating wheel carried by a holder clamped to the drawingen, or the like, in such a manner that the atter, when being moved over the drawing-paper, or other material, is brought into and out of contact with the aper, or the like, so as to produce lines of the nd desired. By such an arrangement, the angle member must, at each time, be exchanged, whenever a change from one kind of line to another is desired, which, obviously, causes trouble and "loss of time, and moreover, the drawing-pen drawing-pen.

cannot be used for producing full lines, without the device bein detached from the drawing-pen, or a troub esome adjustment of the same'being performed.

The object of the present invention is to overcome these drawbacks and provide an attachment for drawing-pens and similar instruments which allows of easy and rapid adjustments .for drawing different kinds of broken lines.

The'invention consists, chiefly, in that the angle member or members are carried by a plate or similar part pivotally attached to a carrier or holder mounted on the drawing instrument, so that one or the other angle member may be brought into or out of opera t1ve position.

In the drawing, Figures 1 and 2 show two side elevations, at right angles to each other, of the improved attachment applied to a Fig. 3 is a side elevation of the attachment detached.

Specification of Letters Patent.

Patented June 30, 1908.

Serial No. 357,220.

Referring to the drawing, the carrier or holder 3 formed by a metal plate, or the like, 4

is attached to the drawing-pen in any suitable manner, for instance by a brace 1 carrying a set-screw 2. Pivotally attached to the said holder, for instance by a pivot 4, is a plate 5 suitably consisting of a folded piece of sheet-metal carrying two angle members 12, 13 of metal or other hard material, said angle members being rotatably mounted on pivots 6 and 7 respectively. The one angle member 12 is shown to be rectangular and the other 13 to be square in shape. Mounted on the same pivots are round contact rollers or wheels 8 and 9, respectively, of elastic material, for instance india rubber, said wheels being connected, in any well known manner, to the angle members 12 and 13, respectively, so as to cause the latter topartake in the rotary movement of the wheels, when one of the wheels rolls upon the drawing-paper, or other material. When the one or the other wheel is in engagement with the paper, the drawing-pen is, in a knownmanner, alternately brought into and out of contact with the paper and, thereby, produces a series of short lines. If, for instance, the angle member 13 for producing dashes is in working position, and it be desired to draw dots and dashes, it is only necessary to turn the plate 5 in such a manner as to bring the other angle member 12 into engagement with the paper. For securing the plate 5 in position, when the one or the other angle member 12 or 13 is in operative position, the lower end of the holder 3 may be provided with a springy lip 10 adapted to form a hold for the plate 5, as shown in Fig. 1. In order to facilitate the turning of the plate 5, the latter can be provided with a nose 11, or the like, adapted to serve as a handle in turning the said plate. When the plate 5 is to be turned from the position shown in Fig. 1 into the position shown in Fig. 3, the lip 10 is pressed toward the pen so as to allow the arm of the plate carrying the angle member 13 to be swung past the said lip.

Having now described my invention what I claim as new and desire to secure by Letters Patent is 1. A broken-line instrument comprising a pen, a plate pivotally supported by the said pen so as to be able to take up different working positions, and angle members pivoted to the said plate, different angle members being adapted to actuate the pen, during drawing,

according as the pivoted plate takes up one or another of its working positions, substantially as and for the purpose set forth.

2. A broken-line instrument comprising a pen, a plate pivotally supported by the said pen so as to be able to take up different working positions, angle members pivoted to the said plate, and elastic contact wheels, one connected to each of the said angle members, said wheels being adapted to bear upon the paper according as the pivoted plate takes up one or another of its working positions, substantially as and for the purpose set forth.

3. A broken-line attachment for drawing instruments comprising a holder adapted to be secured to the instrument, a plate pivotally mounted on the said holder, and an angle member pivoted to the said plate, substantially as and for the purpose set forth.

4. A broken-line attachment for drawing instruments comprising a holder adapted to be secured to the instrument, a plate pivotally mounted on the said holder, an angle member pivoted to the said plate, and an elastic contact wheel connected to the said angle member and adapted to bear upon the paper, substantially as and for the purpose set forth.

5. A broken-line attachment for drawing instruments comprising a holder adapted to be adjustably secured to the instrument, a plate pivotally mounted on the said holder so as to be able to take up diflerent working positions, angle members pivoted to the said plate, elastic contact wheels, one connected to each of the said angle members, said wheels being adapted. to bear upon the paper according as the pivoted plate takes up one or another of its Working positions, and means for holding the plate in one or the other working position, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

KARL JOHAN BERGLIN D.

Witnesses FILI]? RINGsTRoM, DAVID RINGsTRoM. 

